Pv charger off

DIY
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1

Hi everyone,

I’m running a Victron three-phase ESS setup with the following components:

3 x Multiplus II 48/10000

3 x MPPT 250/100

Cerbo GX

6 x Pytes V5 batteries

VE.Bus connected to Cerbo GX

The issue happens only when VE.Bus is connected to the Cerbo GX:

Solar production drops to zero, even though there’s sun and PV available.

The inverter works normally (not in passthrough), but instead of using solar, it pulls energy from the batteries.

If I manually activate the “Charge 100%” command in the Multiplus menu, MPPTs wake up and start producing, the system balances properly, and there’s no import from the grid – everything works fine.

However, once the batteries reach 100% SOC:

All MPPTs shut down completely

The system continues to power loads, but it draws from the batteries instead of using available solar

It seems like the Cerbo or ESS logic is stopping solar production at full SOC, without feeding excess into the grid or directly to loads.

Questions:

Has anyone encountered this behavior before?

Could it be a wrong setting in ESS, DVCC, or Battery Monitor config?

Might this be a firmware-related issue?

All firmware is fully up to date (Multiplus, MPPTs, and Cerbo GX).

Thanks in advance! Any suggestions would be greatly appreciated.

2

Yes… Have seen it. Never used pytes though. I am going to assume you have followed their guides.

For some batteries set the soc to 98% for some reason that helps the solar contribution in ess when connected grid.

The other way which perhaps may be less healthy (depending on your view of things) is switch on feedback from dc and set the max allowed to 0watts. (This works because then ess ignore the battery limits.)
Only do this if you don’t have a sensitive meter though and its allowed.

Another option is to use scheduled charge and set the pv only to cover loads but leave your soc a bit lower. It will charge up the battery, then not discharge it.